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Reference Guide
labels1.C
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1/// \file
2/// \ingroup tutorial_graphs
3/// \notebook
4/// Setting alphanumeric labels in a 1-d histogram.
5///
6/// \macro_image
7/// \macro_code
8///
9/// \author Rene Brun
10
11void labels1()
12{
13 Int_t i;
14 const Int_t nx = 20;
15 const char *people[nx] = {"Jean","Pierre","Marie","Odile",
16 "Sebastien","Fons","Rene","Nicolas","Xavier","Greg",
17 "Bjarne","Anton","Otto","Eddy","Peter","Pasha",
18 "Philippe","Suzanne","Jeff","Valery"};
19 TCanvas *c1 = new TCanvas("c1","demo bin labels",10,10,900,500);
20 c1->SetGrid();
21 c1->SetBottomMargin(0.15);
22 TH1F *h = new TH1F("h","test",nx,0,nx);
23 h->SetFillColor(38);
24 for (i=0;i<5000;i++) h->Fill(gRandom->Gaus(0.5*nx,0.2*nx));
25 h->SetStats(0);
26 for (i=1;i<=nx;i++) h->GetXaxis()->SetBinLabel(i,people[i-1]);
27 h->Draw();
28 TPaveText *pt = new TPaveText(0.6,0.7,0.98,0.98,"brNDC");
29 pt->SetFillColor(18);
30 pt->SetTextAlign(12);
31 pt->AddText("Use the axis Context Menu LabelsOption");
32 pt->AddText(" \"a\" to sort by alphabetic order");
33 pt->AddText(" \">\" to sort by decreasing values");
34 pt->AddText(" \"<\" to sort by increasing values");
35 pt->Draw();
36}
#define h(i)
Definition: RSha256.hxx:106
int Int_t
Definition: RtypesCore.h:45
R__EXTERN TRandom * gRandom
Definition: TRandom.h:62
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition: TAttFill.h:37
virtual void SetTextAlign(Short_t align=11)
Set the text alignment.
Definition: TAttText.h:42
The Canvas class.
Definition: TCanvas.h:23
1-D histogram with a float per channel (see TH1 documentation)}
Definition: TH1.h:577
A Pave (see TPave) with text, lines or/and boxes inside.
Definition: TPaveText.h:21
virtual TText * AddText(Double_t x1, Double_t y1, const char *label)
Add a new Text line to this pavetext at given coordinates.
Definition: TPaveText.cxx:187
void Draw(Option_t *option="") override
Draw this pavetext with its current attributes.
Definition: TPaveText.cxx:238
virtual Double_t Gaus(Double_t mean=0, Double_t sigma=1)
Samples a random number from the standard Normal (Gaussian) Distribution with the given mean and sigm...
Definition: TRandom.cxx:274
TPaveText * pt
return c1
Definition: legend1.C:41